An incompatibility with glib 2.42 causes MySQL Workbench to display a blank results grid. Here's how to patch the source code and recompile the port on FreeBSD.
There's one area where I simply don't like using the command line and that's SQL queries. When I'm working with a database, I appreciate having a decent GUI. That's why I was frustrated when I launched MySQL Workbench and found that the output was blank with no results being displayed for any query. The table editor also showed no data—no column names, indexes, nothing.